Lock



FIG. 1 is a front perspective view of a lock showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a front end view of the lock in accordance with my design, shown in its environment thereof;

FIG. 9 is a front end view of the lock in accordance with my design, shown in its environment thereof; and,

FIG. 10 is a front end view of the lock in accordance with my design, shown in its environment thereof.

The broken lines are for the purpose of illustrating environmental structure and form no part of the claimed design. 

I claim the ornamental design for a lock, as shown and described. 